Step 1
Start With The Project Context
The first screening question is not the battery model. It is the job the system must do. A home backup system, a commercial peak-shaving system and a hybrid agricultural site may all use PV modules, inverters and lithium batteries, but the sizing logic and document scope are different.
- Destination market and project location
- Residential, commercial, agricultural, industrial or utility application
- Grid-tied, hybrid backup, off-grid or storage-ready operation
- New installation or retrofit of an existing PV system
Step 2
Share The Electrical Inputs Early
A supplier can only recommend a credible PV + BESS direction when the basic electrical inputs are clear. If exact engineering data is not available yet, provide the best preliminary range and mark it as an estimate.
- Target PV capacity in kW or MW
- Battery capacity target in kWh or MWh
- Daily load profile, peak load and critical loads
- Backup duration target, such as 2 hours, 4 hours or overnight backup
- Grid voltage, phase type and available installation space
Step 3
Separate Product Preference From System Requirement
Many early inquiries begin with a product name, but the quotation still needs to confirm whether that product fits the system. Treat preferred modules, inverters and batteries as a starting point, then confirm compatibility during quotation.
- Preferred PV module power class or technology route
- Hybrid inverter power range and battery voltage platform
- Wall-mounted, rack battery, cabinet ESS or containerized ESS format
- Communication requirements such as CAN, RS485 or monitoring platform needs
Step 4
Confirm Documents By Market And Model
Datasheets are useful for early review, but compliance files, manuals and warranty documents must match the final model and destination market. Ask for the document pack that supports the actual configuration under review.
- Product datasheets and system proposal
- Applicable certification references for the selected model
- Manuals, drawings or installation notes if required for tender review
- Warranty, delivery and after-sales documentation expectations
Step 5
Use The RFQ To Reduce Back-And-Forth
The goal of the first inquiry is not to solve the whole engineering design in one message. It is to give enough information for the supplier to respond with a relevant configuration direction, document scope and next-step questions.
- State whether the project is budgetary, tender stage or order planning
- Share required quotation timeline and delivery expectation
- Attach existing single-line diagrams or load data if available
- Ask the supplier to identify missing inputs before final quotation